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  • Light of same wavelength is incident on three photo-sensitive surfaces A, B and C. The following observations are recorded (i) From surface A photo electrons are not emitted (ii) From surface B photo electrons are just emitted

Light of same wavelength is incident on three photo-sensitive surfaces A, B and C. The following observations are recorded.

(i) From surface A, photo electrons are not emitted.

(ii) From surface B, photo electrons are just emitted.

(iii) From surface C, photo electrons with some kinetic energy are emitted. Compare the threshold frequencies of the three surfaces and justify your answer

 

 
 
 
 
 

Answers (1)

\nu_{0A}>\nu_{0B}>\nu_{0C}

\\\text{if the frequency of incident photon is}\ \nu,\ by \ Einstiens \ photoelectric\ \\equation\\h\nu=h\nu_0+E_k\\therefore\\\nu_{0A}>\nu,\ \nu_{0B}=\nu,\ \nu_{0C}<\nu

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Safeer PP

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